Moreover, it is also well known that the chirp plays an important role in strong field QED. For example, high intensity laser pulse itself, which we need it for the study of pair production, are obtained by chirped pulse amplification (CPA) technique [1]} in laboratories. Chirp effects on pair production have been widely studied in the homogeneous fields [2]}, [3]}. To our knowledge, current research has been limited on the asymmetrical chirp effects in the spatially inhomogeneous field set up [4]}. Recently, we have studied symmetrical chirp effects in homogeneous electric field [5]}.
